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Bottlenecks and TOC scheduling

1. What are the differences in how bottleneck and non-bottleneck work centers are scheduled under TOC? Why are these differences desirable?

2. Why should buffers be located in front of bottleneck work centers under TOC scheduling? How should the size of the buffers be determined?

3. What are the implications of not allocating material in a shop order after availability checking?

4. Provide some examples of static and dynamic scheduling problems.

Solution Preview

1. What are the differences in how bottleneck and non-bottleneck work centers are scheduled under TOC? Why are these differences desirable?

Bottleneck work centers are scheduled according to a plan, often "how we've always done it" or perhaps the way that works best (at the convenience) of labor. Workers are aware of problems. They bear the brunt of the problem often when waiting for materials or having to hurry up and get work done to make up for being out of parts or material earlier. One of the important parts of "The Goal" is that not only does the production plant suffer due to bottlenecks but the whole organization suffers.

Non-bottleneck work centers operate in a manner to maximize the efficiency of production. In a non-bottleneck environment you are able to work more smoothly and efficiently and with less consternation, less panic, rush. There are lower expenses because production is scheduled and controlled without overtime, rush handling of materials, and lost/unhappy customers.

2. Why should buffers be located in front of bottleneck work ...

Solution Summary

This detailed solution explains the difference between how bottleneck and non bottleneck work centers are scheduled under TOC, and details why these differences are desirable. It also discusses why buffers should be located in front of bottleneck work centers under TOC scheduling, and how the size of the buffers should be determined. In addition, it outlines the implications of not allocating material in a shop order after availability checking. It also includes examples of static and dynamic scheduling problems. The solution includes examples and links to help the student understand better.

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